It is possible to consider 2 types of load shedding. Some
process loads will accept outages of several tens of seconds
and can be restarted afterwards and the process continue.
Other process loads when switched off, even for a very short
period of time, will require manual intervention in the process
equipment prior to restarting. Process loads accepting
outages could be shed first, and then restarted gradually, at
about the same rate as the response of the GTG (0,5% per
second). Loads not accepting outages should be shed only if
absolutely necessary. In this manner it is possible to make
use of both the static and dynamic spinning reserves. It
requires categorizing loads based on acceptable outage times
and not just on importance as is normally done when defining
load shedding tables.